To summarize: tgid <==> getpid() <==> pid of the process which invokes (call pthread_create) the threads and is common to all threads invoked by the process. tid <==> pthread_self() <==> pid of the particular thread, and is unique to each process....
my results is: main pid: 2470 In the thread 0:tid 3086744480 In the thread 0:pid 2470 In the thread 1:tid 3076254624 In the thread 1:pid 2470 Yes, getpid() does return the tgid. but I don't think pthread_self() will return the pid of the lighweight process. Because "Understanding the Linux Kernel" said that the thread group leader's pid equals to the tid, we can't find such a thread(lightweight process) in above results. Regards, Cheng -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
